EP0237931B1 - Apparatus for examining the gas tightness of joints between pipe pieces - Google Patents
Apparatus for examining the gas tightness of joints between pipe pieces Download PDFInfo
- Publication number
- EP0237931B1 EP0237931B1 EP87103473A EP87103473A EP0237931B1 EP 0237931 B1 EP0237931 B1 EP 0237931B1 EP 87103473 A EP87103473 A EP 87103473A EP 87103473 A EP87103473 A EP 87103473A EP 0237931 B1 EP0237931 B1 EP 0237931B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- sealing
- disposed
- testing
- support member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims abstract description 61
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 238000009432 framing Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 244000089486 Phragmites australis subsp australis Species 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/022—Test plugs for closing off the end of a pipe
Definitions
- the invention relates to a device for testing the gas-tightness of connections between pipe sections, in particular between pipes and pipe sockets, using two spaced-apart, annular, elastic sealing bodies, the diameter of which can be changed under axial pressure loading by pressure pistons movable in the longitudinal direction of the pipe, the sealing bodies being between the sealing bodies
- the test point to be monitored is arranged and surrounded by a sealing flange, which is provided with a hole for discharging leakage gas to measuring instruments, and the test equipment serves both as a tool for actuating the pressure pistons and for checking the gas tightness of the pipe connection, the first sealing body inwards of the pipe Test station arranged on an inner support body extending into the tube and can be pressed from the inside against the tube wall and the second seal body arranged on an outer support body around the outer surface of the Pipe sleeve grips.
- the seals bear against the inner tube walls of the tube pieces connected to one another and thus create a test chamber into which test gas is introduced under pressure, for example helium.
- test gas is introduced under pressure, for example helium.
- measuring instruments are connected in the area of the test points, with which any escaping gas quantities are recorded ("sniffed out").
- the tool is not suitable for checking sealing points on short pipe sections, especially not when connecting a pipe end to a pipe socket, since the test point is only a short distance from the free end of the pipe socket or from the pipe end.
- the known tool is only suitable for complete insertion into interconnected pipes and thus for use on the derrick.
- EP-A-0 045 418 shows a device for checking the tightness of threaded connections between a pipe end and a screwed-on sleeve against the passage of liquids. A check of the gas tightness is not possible with this version.
- a device according to GB-A-2 147 425 can also be used to test the gas-tightness of a pipe / socket connection.
- a rubber sealing ring is used, which is arranged inwards of the tube and can be compressed in the axial direction.
- the second seal is located on the face of the free socket end.
- the contact pressure for the frontal sealing is determined by the device applied from the outside.
- the necessary equipment is correspondingly complex.
- a decisive disadvantage is the fact that a liquid pressure medium is used to actuate the axially compressible sealing ring, while a gaseous pressure medium is necessarily required separately for the gas tightness test.
- the invention is based on the object of designing a test device of the construction mentioned at the outset in such a way that connections between short pipe sections, in particular between a pipe and a pipe sleeve, can already be tested for leak tightness in the manufacturer's plant.
- the solution is characterized in that the outer support body encloses the tube end in a sleeve-like manner, and both support bodies are firmly connected to one another outside the tube end, and in a supply channel which the test gas into a between a spacer, the pipe sleeve, the pipe and the outer circumference of the inner support body located annular space, a nozzle with a calibrated bore is arranged.
- the device enables the supply of a test medium along the inner surface of the pipe socket and the pipe end up to a sealing point inside the pipe at the test point. This enables the pressurized test medium to step between the sealing surfaces of the pipe socket and pipe end piece if there is insufficient sealing.
- the test gas exits through the annular gap between the screwing end of the pipe sleeve and the pipe outer jacket and can be fed through the sealing flange and through its bore to a line for measurement purposes.
- the device can be easily plugged onto the free end of the pipe sleeve.
- the sealing flange is provided, which can be connected in a clamp-like manner to the outer support body. It consists of two half-shells that can be pressed against each other in order to achieve the sealing effect required to enclose the test site.
- the testing device is plugged onto the end of the pipe socket and clamped to the sealing flange 10 consisting of two half-shells 10a and 10b.
- the sealing flange 10 is arranged so that it encloses the test point between the two O-rings 13 and 14 and completely seals off from the outside.
- the annular gap between the pipe 30 and the pipe sleeve 31 is checked. Any leakage gas that escapes can be collected in the ring chamber 11, which is formed by the sealing flange 10 and the pipe 30 or the inner end of the pipe flange 31.
- test medium for example helium, can then be pressed into the device under pressure via supply channels 21, 22, 23.
- the test medium serves both as a working medium for acting on the pressure pistons 15 and 20 for the sealing bodies 1 and 2 and for actually checking the gas tightness of the threaded connection of the pipe and the pipe sleeve.
- the pressure of the test medium pushes the pressure pistons 15 and 20 to the right in FIG. 1, so that the sealing bodies 1 and 2 are pressed together and experience radial changes in diameter.
- the sealing body 1 is thereby pressed firmly against the inner surface of the pipe 30 and the sealing body 2 against the outer surface of the pipe sleeve 31.
- the test medium entering the annular space between the tube sleeve 31, tube 30 and the outer circumference of the inner support body via the feed channel 23 and the nozzle 24 is therefore not able to migrate further into the interior of the tube or to flow along the outer surface of the tube sleeve. This allows the pressure build-up required for the test to be achieved.
- test gas could penetrate into the screw thread and gradually migrate into the annular chamber 11, from where the leakage gas is fed via the connection coupling to a leakage gas line and from there could flow to measuring instruments.
- the Sealing flange half-shells are lifted after relieving the pressure on the pneumatic pressure cylinders and then the tester is removed from its seat.
- the assembly and disassembly of the test device are clearly extremely easy and are therefore suitable for quick checking of the leak tightness already in the manufacturing plant.
Abstract
Description
Die Erfindung betrifft ein Gerät zum Prüfen der Gasdichtigkeit von Verbindungen zwischen Rohrstücken, insbesondere zwischen Rohren und Rohrmuffen unter Verwendung zweier mit Abstand zueinander angeordneter, ringförmiger, elastischer Dichtungskörper, deren Durchmesser unter axialer Druckbelastung durch in Rohrlängsrichtung bewegbare Druckkolben veränderbar ist, wobei zwischen den Dichtungskörpern die zu überwachende Prüfstelle angeordnet und von einem Dichtflansch eingefaßt ist, der mit einer Bohrung zur Ableitung von Leckgas zu Meßinstrumenten versehen ist, und das Prüfmittel sowohl als Arbeitsmittel zur Betätigung der Druckkolben als auch zum überprüfen der Gasdichtigkeit der Rohrverbindung dient, wobei der erste Dichtkörper rohreinwärts der Prüfstelle auf einem in das Rohr hineinreichenden inneren Tragkörper angeordnet und von innen gegen die Rohrwandung preßbar ist und der zweite, auf einem äußeren Tragkörper angeordnete Dichtkörper um die Außenfläche der Rohrmuffe greift.The invention relates to a device for testing the gas-tightness of connections between pipe sections, in particular between pipes and pipe sockets, using two spaced-apart, annular, elastic sealing bodies, the diameter of which can be changed under axial pressure loading by pressure pistons movable in the longitudinal direction of the pipe, the sealing bodies being between the sealing bodies The test point to be monitored is arranged and surrounded by a sealing flange, which is provided with a hole for discharging leakage gas to measuring instruments, and the test equipment serves both as a tool for actuating the pressure pistons and for checking the gas tightness of the pipe connection, the first sealing body inwards of the pipe Test station arranged on an inner support body extending into the tube and can be pressed from the inside against the tube wall and the second seal body arranged on an outer support body around the outer surface of the Pipe sleeve grips.
Um Undichtigkeiten an Rohrverbindungsstellen zu beseitigen ist es üblich, Verrohrungen einer Leckprüfung zu unterwerfen, bevor sie zum Einsatz kommen und beispielsweise in ein Bohrloch abgesenkt werden. Dabei wird ein unter Druck stehendes Prüfmedium auf eine Verbindung gebracht und der Druck hinsichtlich eines Abfalles überprüft.
Nach einem weiteren Prüfverfahren auf Leckstellen ist es bekannt, ein Gas durch zwei miteinander verbundene Rohrstücke zu leiten. Dabei wird der Gasdruck mit Hilfe eines Absperrwerkzeuges von innen aufgebracht. Ein solches Verfahren und ein Werkzeug zur Durchführung des Verfahrens ist beispielsweise in der DE-OS 30 30 665 beschrieben. Es zeigt zwei mit Abstand zueinander liegende ringförmige Dichtungen aus federnd nachgiebigem Material, die durch zwei Kolben, von denen jeder einer der Dichtungen zugeordnet ist, axial zusammengepreßt werden. Dadurch wird erreicht, daß sich die Dichtungen an die inneren Rohrwandungen der miteinander verbundenen Rohrstücke anlegen und somit eine Prüfkammer schaffen, in welche Prüfgas unter Druck, beispielsweise Helium eingeleitet wird. An der Außenseite dieser Prüfkammer sind im Bereich der Prüfstellen Meßinstrumente angeschlossen, mit denen gegebenenfalls austretende Gasmengen erfaßt ("erschnüffelt") werden. Das Werkzeug eignet sich jedoch nicht für das überprüfen von Dichtstellen bei kurzen Rohrstücken, insbesondere nicht bei der Verbindung eines Rohrendes mit einer Rohrmuffe, da die Prüfstelle nur einen geringen Abstand von dem freien Ende der Rohrmuffe bzw. vom Rohrende aufweist. Das bekannte Werkzeug ist lediglich zur vollständigen Einführung in miteinander verbundene Rohre und damit für den Einsatz am Bohrturm geeignet.In order to eliminate leaks at pipe connection points, it is common to subject pipes to a leak test before they are used and, for example, to lower them into a borehole. A test medium under pressure is connected and the pressure is checked for a drop.
After another test procedure for leaks, it is known to pass a gas through two interconnected pipe sections. The gas pressure is applied from the inside using a shut-off tool. Such a method and a tool for performing the method is described for example in DE-OS 30 30 665. It shows two spaced-apart annular seals made of resilient material, which are axially compressed by two pistons, each of which is assigned to one of the seals. It is thereby achieved that the seals bear against the inner tube walls of the tube pieces connected to one another and thus create a test chamber into which test gas is introduced under pressure, for example helium. On the outside of this test chamber, measuring instruments are connected in the area of the test points, with which any escaping gas quantities are recorded ("sniffed out"). However, the tool is not suitable for checking sealing points on short pipe sections, especially not when connecting a pipe end to a pipe socket, since the test point is only a short distance from the free end of the pipe socket or from the pipe end. The known tool is only suitable for complete insertion into interconnected pipes and thus for use on the derrick.
Die EP-A-0 045 418 zeigt eine Vorrichtung zum Prüfen der Dichtigkeit von Gewindeverbindungen zwischen einem Rohrende und einer aufgeschraubten Muffe gegen den Durchtritt von Flüssigkeiten. Eine Überprüfung der Gasdichtigkeit ist mit dieser Ausführung nicht möglich. Durch eine Vorrichtung nach der GB-A-2 147 425 kann dagegen auch die Gasdichtigkeit einer Rohr- Muffenverbindung geprüft werden. Jedoch wird dabei nur von einem Gummidichtring Gebrauch gemacht, der rohreinwärts angeordnet und in Axialrichtung zusammendrückbar ist. Die zweite Abdichtung befindet sich stirnseitig am freien Muffenende. Die Anpreßkraft zur stirnseitigen Abdichtung wird von der Vorrichtung von außen aufgebracht. Entsprechend aufwendig ist die dafür notwendige Einrichtung. Ein entscheidender Nachteil ist aber darin zu sehen, daß zur Betätigung des axial zusammenpreßbaren Dichtringes ein flüssiges Druckmittel verwendet wird, während notwendigerweise getrennt davon ein gasförmiges Druckmittel für die Gasdichtigkeitsprüfung erforderlich ist.EP-A-0 045 418 shows a device for checking the tightness of threaded connections between a pipe end and a screwed-on sleeve against the passage of liquids. A check of the gas tightness is not possible with this version. In contrast, a device according to GB-A-2 147 425 can also be used to test the gas-tightness of a pipe / socket connection. However, only a rubber sealing ring is used, which is arranged inwards of the tube and can be compressed in the axial direction. The second seal is located on the face of the free socket end. The contact pressure for the frontal sealing is determined by the device applied from the outside. The necessary equipment is correspondingly complex. A decisive disadvantage is the fact that a liquid pressure medium is used to actuate the axially compressible sealing ring, while a gaseous pressure medium is necessarily required separately for the gas tightness test.
Der Erfindung liegt die Aufgabe zu Grunde, ein Prüfgerät der eingangs genannten Konstruktion so zu gestalten, daß Verbindungen zwischen kurzen Rohrstücken, insbesondere zwischen einem Rohr und einer Rohrmuffe, auf Leckdichtigkeit bereits im Herstellerwerk geprüft werden können. Die Lösung zeichnet sich dadurch aus, daß der äußere Tragkörper das Rohrende hülsenförmig umfaßt und dabei beide Tragkörper außerhalb des Rohrendes miteinander fest verbunden sind, und daß in einem Zufuhrkanal, welcher das Prüfgas in einen zwischen einem Distanzstück, der Rohrmuffe, dem Rohr und dem Außenumfang des inneren Tragkörpers befindlichen Ringraum leitet, eine Düse mit kalibrierter Bohrung angeordnet ist.The invention is based on the object of designing a test device of the construction mentioned at the outset in such a way that connections between short pipe sections, in particular between a pipe and a pipe sleeve, can already be tested for leak tightness in the manufacturer's plant. The solution is characterized in that the outer support body encloses the tube end in a sleeve-like manner, and both support bodies are firmly connected to one another outside the tube end, and in a supply channel which the test gas into a between a spacer, the pipe sleeve, the pipe and the outer circumference of the inner support body located annular space, a nozzle with a calibrated bore is arranged.
Das Gerät ermöglicht die Zuführung eines Prüfmediums an der Innenfläche der Rohrmuffe und des Rohrendes entlang bis zu einem Dichtpunkt rohreinwärts der Prüfstelle. Das unter Druck stehende Prüfmedium hat dadurch die Möglichkeit, zwischen die Dichtflächen von Rohrmuffe und Rohrendstück zu treten, sofern eine ungenügende Abdichtung vorhanden sein sollte. In diesem Fall tritt das Prüfgas durch den Ringspalt zwischen dem Verschraubungsende der Rohrmuffe und dem Rohraußenmantel aus und kann durch den Dichtflansch und über seine Bohrung einer Leitung zu Meßzwecken zugeführt werden. Das Gerät ist in einfacher Weise auf das freie Ende der Rohrmuffe aufsteckbar. Es greift vorzugsweise mit einem Tragkörper, auf dem der erste Dichtkörper angeordnet ist, in das Rohr hinein, während der zweite Dichtkörper auf einem das Rohrende hülsenförmig umfassenden zweiten Tragkörper angeordnet ist. Beide Tragkörper sind miteinander fest verbunden, vorzugsweise verschraubt. Im Bereich der Prüfstelle ist der Dichtflansch vorgesehen, der mit dem äußeren Tragkörper klammerartig verbunden sein kann. Er besteht aus zwei Halbschalen, die gegeneinander preßbar sind, um die erforderliche Dichtwirkung zum Einschließen der Prüfstelle zu erreichen.The device enables the supply of a test medium along the inner surface of the pipe socket and the pipe end up to a sealing point inside the pipe at the test point. This enables the pressurized test medium to step between the sealing surfaces of the pipe socket and pipe end piece if there is insufficient sealing. In this case, the test gas exits through the annular gap between the screwing end of the pipe sleeve and the pipe outer jacket and can be fed through the sealing flange and through its bore to a line for measurement purposes. The device can be easily plugged onto the free end of the pipe sleeve. It preferably engages into the tube with a support body on which the first sealing body is arranged, while the second sealing body is arranged on a second support body which surrounds the tube end in the form of a sleeve. Both support bodies are firmly connected to each other, preferably screwed. In the area of the test site, the sealing flange is provided, which can be connected in a clamp-like manner to the outer support body. It consists of two half-shells that can be pressed against each other in order to achieve the sealing effect required to enclose the test site.
Mit der erfindungsgemäßen Lösung ist es gelungen, ein wirkungsvolles, einfach zu handhabendes Gerät zum Prüfen der Verbindungsstellen zwischen kurzen Rohrstücken bzw. zwischen Rohren und Rohrmuffen zu schaffen, so daß die Dichtprüfung bereits herstellerseitig durchgeführt werden kann und die Anlieferung von Rohren mit mangelhafter Leckdichtigkeit vermieden wird.With the solution according to the invention it has been possible to create an effective, easy-to-use device for checking the connection points between short pipe sections or between pipes and pipe sockets, so that the leak test can already be carried out by the manufacturer and the delivery of pipes with inadequate leak tightness is avoided .
In der Zeichnung ist ein Ausführungsbeispiel der Neuerung schematisch dargestellt und nachstehend erläutert.In the drawing, an embodiment of the innovation is shown schematically and explained below.
Es zeigen:
- Fig. 1
- einen Längsschnitt durch das Prüfgerät, aufgesteckt auf eine durch unterbrochene Strichführung angedeutete Rohrmuffe, die auf das Ende eines Rohres geschraubt ist,
- Fig. 2
- die Stirnansicht des Prüfgerätes gemäß Fig. 1.
- Fig. 1
- a longitudinal section through the test device, plugged onto a pipe socket, indicated by broken lines, which is screwed onto the end of a pipe,
- Fig. 2
- the front view of the test device of FIG. 1st
Die wesentlichen Einzelelemente des Gerätes tragen die nachstehend aufgeführten Bezugszeichen:
- 1
- erster Dichtkörper (Packer)
- 2
- zweiter Dichtkörper (Packer)
- 3
- innerer Tragkörper für Dichtkörper 1
- 4
- äußerer Tragkörper für Dichtkörper 2
- 5
- Gewindezapfen
- 6
- Endmutter
- 7
- Distanzstück
- 7a
- Gewindezapfen des Distanzstückes
- 8
- äußeres Enstück des
Tragkörpers 3 - 8a
- Gewindezapfen des
Endstückes 8 - 9
- Endmutter des
äußeren Tragkörpers 3 - 10
- Dichtflansch (Schnüffelklammer)
- 10a
- obere Halbschale des Dichtflansches 10
- 10b
- untere Halbschale des Dichtflansches 10
- 11
Ringkammer zwischen Dichtflansch 10 und Prüfstelle- 12
- Verbindungskupplung der Leckgasleitung
- 13 u. 14
- O-Ringe
- 15
- Druckkolben für ersten Dichtkörper
- 16
- Distanzbuchse
- 17a u. 17b
- Stützringe für ersten Dichtkörper
- 18
- Entlüftungsbohrung der Distanzbuchse 16
- 19
- Distanzbuchse
- 20
- Druckkolben für zweiten Dichtkörper
- 21, 22, 23
- Zuführkanäle für Prüfmedium
- 23a u. 23b
- Zweigkanäle
- 24
- Düse
- 25
- Verschlußstopfen
- 26a, 26b
- pneumatischer Stellzylinder
- 27a, 27b
- Kolbenstange
- 28a, 28b
- Winkelprofile der unteren Dichtflanschhalbschale
- 29a, 29b
- Winkelprofile der oberen Dichtflanschhalbschale
- 30
- Rohr
- 31
- Rohrmuffe
- 31a
- Dichtbund der Rohrmuffe
- 32
- Entlüftungsbohrung im äußeren Tragkörper 4
- 1
- first sealing body (packer)
- 2nd
- second sealing body (packer)
- 3rd
- inner support body for sealing body 1
- 4th
- outer support body for sealing body 2
- 5
- Threaded pin
- 6
- Final mother
- 7
- Spacer
- 7a
- Threaded pin of the spacer
- 8th
- outer end piece of the supporting
body 3 - 8a
- Threaded pin of the
end piece 8 - 9
- End nut of the
outer support body 3 - 10th
- Sealing flange (sniffer clip)
- 10a
- upper half-shell of the sealing
flange 10 - 10b
- lower half-shell of the sealing
flange 10 - 11
- Annular chamber between sealing
flange 10 and test center - 12
- Connection coupling of the leak gas line
- 13 u. 14
- O-rings
- 15
- Pressure piston for the first sealing body
- 16
- Spacer
- 17a u. 17b
- Support rings for the first sealing body
- 18th
- Vent hole of the
spacer bush 16 - 19th
- Spacer
- 20th
- Pressure piston for the second sealing body
- 21, 22, 23
- Feed channels for test medium
- 23a u. 23b
- Branch channels
- 24th
- jet
- 25th
- Sealing plug
- 26a, 26b
- pneumatic actuator
- 27a, 27b
- Piston rod
- 28a, 28b
- Angle profiles of the lower sealing flange half-shell
- 29a, 29b
- Angle profiles of the upper sealing flange half-shell
- 30th
- pipe
- 31
- Pipe socket
- 31a
- Sealing collar of the pipe sleeve
- 32
- Vent hole in the outer supporting body 4
Nach der festen Verschraubung der Rohrmuffe 31 mit dem Rohr 30 wird das Prüfgerät auf das Ende der Rohrmuffe gesteckt und mit dem aus zwei Halbschalen 10a und 10b bestehenden Dichtflansch 10 verklammert. Der Dichtflansch 10 wird so angeordnet, daß er die Prüfstelle zwischen den Beiden O-Ringen 13 und 14 einschließt und nach außen völlig abdichtet. Geprüft wird der Ringspalt zwischen dem Rohr 30 und der Rohrmuffe 31. Gegebenenfalls austretendes Leckgas kann in der Ringkammer 11 gesammelt wer den, die durch den Dichtflansch 10 und das Rohr 30 bzw. das innere Ende des Rohrflansches 31 gebildet wird.After the
Nach dem Aufstecken des Prüfgerätes werden die beiden Dichtschalen 10a und 10b des Dichtflansches 10 mit Hilfe pneumatischer Stellzylinder 26a und 26b gegeneinandergepreßt, so daß eine genügende Abdichtung des zu prüfenden Ringspaltes nach außen erreicht wird. Winkeleisen 28a, 28b bzw. 29a, 29b sorgen für die starre Verbindung von Stellzylinder und Kolbenstangen mit den Dichtflanschhalbschalen. Anschließend kann Prüfmedium, beispielsweise Helium, unter Druck über Zufuhrkanäle 21, 22, 23 in das Gerät gepreßt werden. Das Prüfmedium dient dabei sowohl als Arbeitsmittel zur Beaufschlagung der Druckkolben 15 und 20 für die Dichtkörper 1 und 2 als auch zum eigentlichen Überprüfen der Gasdichtigkeit der Gewindeverbindung von Rohr und Rohrmuffe.After the test device has been plugged on, the two sealing
Durch den Druck des Prüfmediums werden die Druckkolben 15 und 20 in Fig. 1 nach rechts verschoben, so daß die Dichtkörper 1 und 2 zusammengepreßt und radiale Durchmesserveränderungen erfahren. Der Dichtkörper 1 wird dadurch fest an den Innenmantel des Rohres 30 und der Dichtkörper 2 an die Außenfläche der Rohrmuffe 31 gepreßt. Das über den Zufuhrkanal 23 und die Düse 24 mit einer kalibrierten Bohrung in den Ringraum zwischen Rohrmuffe 31, Rohr 30 und Außenumfang des inneren Tragkörpers gelangende Prüfmedium ist dadurch nicht in der Lage, weiter in das Rohrinnere hineinzuwandern bzw. an der Außenfläche der Rohrmuffe entlangzuströmen. Dadurch kann der für die Prüfung notwendige Druckaufbau erreicht werden.The pressure of the test medium pushes the
Sollte die ringförmige Dichtfläche zwischen dem äußeren Ende des Rohres 30 und dem Dichtbund 31a der Rormuffe 31 nicht genügend abdichten, könnte Prüfgas in das Schraubgewinde eindringen und allmählich bis in die Ringkammer 11 wandern, von wo das Leckgas über die Verbindungskupplung einer Leckgasleitung zugeführt und von dort zu Meßinstrumenten strömen könnte.If the annular sealing surface between the outer end of the
Nach der Beendigung des Prüfvorganges werden zunächst die Dichtflanschhalbschalen nach der Entlastung der pneumatischen Druckzylinder abgehoben und anschließend das Prüfgerät von seinem Sitz abgezogen. Die Montage und Demontage des Prüfgerätes sind erkennbar äußerst einfach und dadurch zur raschen Überprüfung der Leckdichtigkeit bereits im Herstellerwerk geeignet.After completing the test procedure, the Sealing flange half-shells are lifted after relieving the pressure on the pneumatic pressure cylinders and then the tester is removed from its seat. The assembly and disassembly of the test device are clearly extremely easy and are therefore suitable for quick checking of the leak tightness already in the manufacturing plant.
Claims (7)
- An apparatus for testing the gas-tightness of connections between tubular members, more particularly pipes (30) and pipe sockets (31), using two spaced-apart annular resilient sealing members (1, 2) whose diameter can be altered under axial compressive loading by pressure pistons (15, 20) movable in the longitudinal direction of the pipes, the testing place to be monitored being disposed between the sealing members (1, 2) and framed by a sealing flange (10) formed with a bore for conducting leakage gas to measuring instruments, the testing agent acting both as a working medium for actuating the pressure pistons (15, 20) and also for monitoring the gas-tightness of the pipe connection (30, 31), the first sealing member (1) being disposed towards the inside of the pipe from the testing place on an inner supporting member (3) extending into the pipe (30) and being pressible from inside against the pipe wall, the second sealing member (2), which is disposed on an external support member (4), engaging around the outer surface of the pipe socket (31), characterized in that the outer support member (4) engages around the pipe end after the fashion of a sleeve, the two support members (3, 4) being rigidly interconnected outside the pipe end; and a nozzle (24) having a calibrated bore is disposed in a supply channel (23) which conducts the testing gas into an annular space disposed between a spacer member (7), the pipe socket (31), the pipe (30) and the external periphery of the inner support member (3).
- An apparatus according to Claim 1, characterized in that the sealing flange (10) framing the testing place consists of two half-shells (10a, 10b) which can be pressed against one another.
- An apparatus according to Claims 1 or 2, characterized in that the half shells (10a, 10b) can be pressed against one another by means of adjusting cylinders (26a, 26b).
- An apparatus according to one or more of Claims 1 to 3, characterized in that the inner support member is made up of a number of parts (3, 6, 7, 8, 16, 17a, 17b) which are screwed to one another.
- An apparatus according to one or more of Claims 1 to 4, characterized in that the pressure piston (15) for the first sealing member (1) is disposed to slide after the fashion of a sleeve on the support member and bears via an external shoulder against one of the supporting rings between which the first sealing member (1) is disposed.
- An apparatus according to one or more of Claims 1 to 5, characterized in that the sleeve-shaped pressure piston (20) for the second sealing member (2) is disposed slideably in the longitudinal direction in the outer, also sleeve-shaped support member (4), the pressure piston bearing via an internal shoulder against the second sealing member (2).
- An apparatus according to Claim 6, characterized in that the outer support member (4) is closed by an annular end nut (9) acting as an abutment for the pressure piston (20), a spacing bush (19) being disposed between the end nut (9) and the sealing member (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87103473T ATE66299T1 (en) | 1986-03-15 | 1987-03-11 | DEVICE FOR TESTING THE GAS TIGHTNESS OF CONNECTIONS BETWEEN PIECES. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3608814 | 1986-03-15 | ||
| DE3608814A DE3608814C1 (en) | 1986-03-15 | 1986-03-15 | Device for checking the gas tightness of connections between pipe pieces |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0237931A2 EP0237931A2 (en) | 1987-09-23 |
| EP0237931A3 EP0237931A3 (en) | 1988-03-23 |
| EP0237931B1 true EP0237931B1 (en) | 1991-08-14 |
Family
ID=6296530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87103473A Expired - Lifetime EP0237931B1 (en) | 1986-03-15 | 1987-03-11 | Apparatus for examining the gas tightness of joints between pipe pieces |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4753108A (en) |
| EP (1) | EP0237931B1 (en) |
| JP (1) | JPS62284234A (en) |
| AT (1) | ATE66299T1 (en) |
| BR (1) | BR8701195A (en) |
| CA (1) | CA1300399C (en) |
| DE (1) | DE3608814C1 (en) |
| NO (1) | NO172995C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4887646A (en) * | 1988-02-18 | 1989-12-19 | The Boeing Company | Test fitting |
| CA1312557C (en) * | 1988-06-08 | 1993-01-12 | Mario C. Dufort | Test plug for flanged pipes |
| US5099725A (en) * | 1990-10-19 | 1992-03-31 | Franks Casing Crew And Rental Tools, Inc. | Torque transfer apparatus |
| DE4134489A1 (en) * | 1991-03-28 | 1992-10-01 | Weatherford Prod & Equip | DEVICE FOR TESTING THE GAS TIGHTNESS OF LOSSABLE HOLLOW BODY CONNECTIONS |
| US5515885A (en) * | 1994-01-28 | 1996-05-14 | Lanasa; Douglas | Plug assembly |
| US5844127A (en) * | 1995-01-23 | 1998-12-01 | Berube; Guy | Apparatus for isolating or testing a pipe segment |
| US6131441A (en) * | 1996-12-02 | 2000-10-17 | Berube; Guy | Apparatus and method for isolating or testing a pipe segment |
| US5932798A (en) * | 1998-06-29 | 1999-08-03 | Sonoco Development, Inc. | Can strength and leakage test device |
| CA2312577C (en) | 2000-06-27 | 2005-02-08 | Horst Gotowik | Apparatus for testing or isolating a segment of pipe |
| CA2625869A1 (en) * | 2005-10-14 | 2007-04-19 | Car-Ber Investments Inc. | Apparatus and method for testing or isolating a pipe segment with magnetically actuated sealing means |
| KR101111598B1 (en) * | 2011-08-30 | 2012-02-14 | 주식회사 이피아이 | Coupled pipe end hydrostatic tester |
| CN102944370B (en) * | 2012-10-31 | 2015-03-25 | 四川安东油气工程技术服务有限公司 | Pressure device for airtightness detection of casing and manufacturing method thereof |
| US20230167934A1 (en) * | 2021-11-30 | 2023-06-01 | John C. Lausch | Plugs for anchoring within equipment and methods of use for pressure testing |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR826980A (en) * | 1936-10-27 | 1938-04-13 | Deutsche Roehrenwerke Ag | Method and device for checking the tightness of tube ends and fittings for tubes and pipes |
| US2246885A (en) * | 1939-10-10 | 1941-06-24 | Nat Tube Co | Pipe joint tester |
| US2334303A (en) * | 1941-03-17 | 1943-11-16 | Cameron Iron Works Inc | Means for closing and leakage testing of well equipment |
| US3803901A (en) * | 1972-10-10 | 1974-04-16 | Taylor Wilson Mfg Co | Pipe tester |
| US3975945A (en) * | 1975-06-30 | 1976-08-24 | Service Equipment Design Co., Inc. | Apparatus for testing pipe for leaks |
| GB2056091B (en) * | 1979-08-13 | 1984-06-27 | Drexel Equipment Ltd | Leak testing piping |
| GB2055210A (en) * | 1979-08-13 | 1981-02-25 | Drexel Equipment Ltd | Leak testing pipes |
| GB2129948B (en) * | 1979-08-13 | 1984-10-31 | Boc Nowsco Ltd | Leak testing tool |
| DE3029180A1 (en) * | 1980-08-01 | 1982-03-04 | Estel Hoesch Werke Ag, 4600 Dortmund | METHOD AND DEVICE FOR TESTING OIL FIELD TUBES |
| US4571986A (en) * | 1982-10-12 | 1986-02-25 | Kabushiki Kaisha Kobe Seiko Sho | Pipe leak detector |
| DE3307813C1 (en) * | 1983-03-02 | 1984-08-23 | Mannesmann AG, 4000 Düsseldorf | Tool for testing pipes in a pipe test press |
| GB8326215D0 (en) * | 1983-09-30 | 1983-11-02 | Drexel Oilfield Services Hk | Leakage detection |
| US4557139A (en) * | 1984-07-31 | 1985-12-10 | Loomis International Inc. | Leak detection method and apparatus |
| US4646559A (en) * | 1985-01-22 | 1987-03-03 | Jack W. Hayden | Apparatus and method to test a single connection between a pipe coupling and a single pipe end connected therewith |
-
1986
- 1986-03-15 DE DE3608814A patent/DE3608814C1/en not_active Expired
-
1987
- 1987-03-11 US US07/024,347 patent/US4753108A/en not_active Expired - Fee Related
- 1987-03-11 EP EP87103473A patent/EP0237931B1/en not_active Expired - Lifetime
- 1987-03-11 AT AT87103473T patent/ATE66299T1/en not_active IP Right Cessation
- 1987-03-11 NO NO870995A patent/NO172995C/en unknown
- 1987-03-16 BR BR8701195A patent/BR8701195A/en not_active IP Right Cessation
- 1987-03-16 CA CA000532076A patent/CA1300399C/en not_active Expired - Fee Related
- 1987-03-16 JP JP62059084A patent/JPS62284234A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE3608814C1 (en) | 1987-08-13 |
| EP0237931A2 (en) | 1987-09-23 |
| JPS62284234A (en) | 1987-12-10 |
| NO172995B (en) | 1993-06-28 |
| NO870995L (en) | 1987-09-16 |
| BR8701195A (en) | 1988-01-05 |
| CA1300399C (en) | 1992-05-12 |
| ATE66299T1 (en) | 1991-08-15 |
| US4753108A (en) | 1988-06-28 |
| JPH0513568B2 (en) | 1993-02-22 |
| NO172995C (en) | 1993-10-06 |
| NO870995D0 (en) | 1987-03-11 |
| EP0237931A3 (en) | 1988-03-23 |
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